CN112186017A - Display panel, manufacturing method and display device - Google Patents
Display panel, manufacturing method and display device Download PDFInfo
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- CN112186017A CN112186017A CN202011061481.9A CN202011061481A CN112186017A CN 112186017 A CN112186017 A CN 112186017A CN 202011061481 A CN202011061481 A CN 202011061481A CN 112186017 A CN112186017 A CN 112186017A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/70—Testing, e.g. accelerated lifetime tests
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
Abstract
The embodiment of the application provides a display panel, a manufacturing method and display equipment. The display panel includes: the display device comprises a substrate, a first electrode and a second electrode, wherein the substrate comprises a display area and a peripheral area surrounding the display area; an encapsulation layer comprising a first portion and a second portion; the first part comprises an organic packaging layer sandwiched between inorganic packaging layers; the first part covers the display area; the second part comprises a plurality of inorganic packaging layers; and the capacitor structure is arranged on one side of the peripheral area and comprises a first electrode, a second electrode and at least one part of a second part positioned between the first electrode and the second electrode. In the display panel that this application embodiment provided, when pressing from both sides the encapsulation layer of locating between first electrode and the second electrode and appearing the crackle, can lead to the capacitance value of capacitor structure to change, whether the crackle appears in the encapsulation layer that consequently detects display panel according to the capacitance value of capacitor structure, and the technical staff of being convenient for in time discovers display panel's crackle.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a manufacturing method and display equipment.
Background
With the development of display technology and the requirements of application scenarios, more and more flexible display devices are on the market. Compared with the traditional display device, the flexible display device has remarkable advantages such as reduced volume, portability, wide application range and the like.
For an OLED (organic light-Emitting Diode) display device, cracks are easily generated in an encapsulation layer of an OLED display panel during an encapsulation process or a use process, and if the cracks generated by processing the OLED display panel cannot be found in time, external water vapor, oxygen and the like enter the display panel along with the expansion of the cracks, so that the stability and the service life of the OLED display panel are affected.
However, in the prior art, crack detection needs to be performed on the OLED display panel by means of external detection equipment, and meanwhile, in the detection process, the detection equipment may cause certain damage to the OLED display panel.
Disclosure of Invention
The application provides a display panel, a manufacturing method and display equipment aiming at the defects of the existing mode, and aims to solve the technical problem that crack detection is inconvenient to an OLED display panel in the prior art.
In a first aspect, an embodiment of the present application provides a display panel, including:
the display device comprises a substrate, a first electrode and a second electrode, wherein the substrate comprises a display area and a peripheral area surrounding the display area;
an encapsulation layer comprising a first portion and a second portion; the first part comprises an organic packaging layer sandwiched between inorganic packaging layers; the first part covers the display area; the second part comprises a plurality of inorganic packaging layers;
and the capacitor structure is arranged on one side of the peripheral area and comprises a first electrode, a second electrode and at least one part of a second part positioned between the first electrode and the second electrode.
In a second aspect, an embodiment of the present application provides a method for manufacturing a display panel, including:
preparing a first electrode in the substrate around a peripheral area outside the display area;
preparing an encapsulation layer on one side of the substrate, so that a first part of the encapsulation layer covers the display area, and a second part of the encapsulation layer covers the peripheral area and the first electrode;
and preparing a second electrode on the side of the second part far away from the first electrode to obtain the capacitor structure.
In a third aspect, an embodiment of the present application provides a display device, including the display panel provided in the first aspect.
The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:
in the display panel provided in the embodiment of the present application, a first electrode and a second electrode are disposed in a peripheral region of a substrate, and a part of a second portion of an edge of an encapsulation layer in the display panel is sandwiched between the first electrode and the second electrode. The first electrode, the second electrode and the second part form a capacitor structure, and when cracks appear on the packaging layer clamped between the first electrode and the second electrode, the capacitance value of the capacitor structure can be changed, so that whether cracks appear on the packaging layer of the display panel can be detected according to the capacitance value of the capacitor structure; compared with the existing crack detection technology, the display panel of the embodiment of the application does not need to damage the structure of the display panel in the detection process; meanwhile, the detection is convenient, so that technicians can find cracks of the display panel in time and adopt corresponding measures, the probability of crack expansion can be reduced, the stability of the display panel can be enhanced, and the service life of the display panel can be prolonged.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is an ab-direction cross-sectional view of the display panel of FIG. 1 according to an embodiment of the present disclosure;
fig. 3 is an enlarged schematic view of a display panel shown in fig. 2 according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure;
fig. 5a to 5c are schematic diagrams of intermediate structures of various flows in a manufacturing method of a display panel according to an embodiment of the present application.
Description of reference numerals:
100-a substrate; 110-a display area; 120-a peripheral region;
131-a first portion of an encapsulation layer; 132-a second portion of the encapsulation layer; 133-a first inorganic encapsulation layer; 134-organic encapsulation layer; 135-a second inorganic encapsulation layer;
141-a first electrode; 1411-a first lead; 142-a second electrode;
150-groove structure;
160-a barrier structure;
171-a buffer layer; 172-a first insulating layer; 173-second insulating layer; 174-an intermediate layer; 175-a planarization layer; 176-an anode layer; 177-a pixel definition layer; 178-a light-emitting layer; 179-cathode layer; 181-active layer; 182-a first gate; 183-second gate; 184-source drain.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
An embodiment of the application provides a display panel, and fig. 1 shows a schematic structural diagram of the display panel, and fig. 2 shows an ab-direction cross-sectional diagram of the display panel in fig. 1. The display panel includes: a substrate 100, the substrate 100 including a display region 110 and a peripheral region 120 surrounding the display region 110; an encapsulation layer comprising a first portion 131 and a second portion 132; the first portion 131 includes an organic encapsulation layer sandwiched between inorganic encapsulation layers; the first portion 131 covers the display area 110; the second portion 132 includes several inorganic encapsulation layers; and a capacitor structure disposed at one side of the peripheral region, the capacitor structure including a first electrode 141, a second electrode 142, and at least a portion of the second portion 132 between the first electrode 141 and the second electrode 142.
In the display panel provided in the embodiment of the present application, the peripheral area 120 of the substrate 100 is provided with the first electrode 141 and the second electrode 142, and the portion of the second portion 132 of the edge of the encapsulation layer in the display panel is sandwiched between the first electrode 141 and the second electrode 142. The first electrode 141, the second electrode 142 and the second portion 132 form a capacitor structure, and when a crack occurs in an encapsulation layer sandwiched between the first electrode 141 and the second electrode 142, a capacitance value of the capacitor structure changes, so that whether the crack occurs in the encapsulation layer of the display panel can be detected according to the capacitance value of the capacitor structure; compared with the existing crack detection technology, the display panel of the embodiment of the application does not need to damage the structure of the display panel in the detection process; meanwhile, the detection is convenient, so that technicians can find cracks of the display panel in time and adopt corresponding measures, the probability of crack expansion can be reduced, the stability of the display panel can be enhanced, and the service life of the display panel can be prolonged.
As is known to those skilled in the art, for an OLED display panel, since the organic substances inside the OLED display panel are easily corroded by external water and oxygen, the OLED display panel needs to be provided with an encapsulation layer to isolate the external water and oxygen. However, the encapsulation layer of the OLED display panel, especially the edge portion of the encapsulation layer, is prone to crack under the stress or external force of the display panel itself, and if the processing is not found in time, the stability and the service life of the OLED display panel are affected along with the expansion of the crack.
Therefore, in the embodiment of the present application, by providing the first electrode 141 and the second electrode 142 in the second portion 132 of the edge of the encapsulation layer, the second portion 132 is partially sandwiched between the first electrode 141 and the second electrode 142, when a crack occurs in the second portion 132 sandwiched between the first electrode 141 and the second electrode 142, a capacitance value of the capacitor structure may be changed, and thus whether the crack occurs in the encapsulation layer of the display panel may be detected according to the capacitance value of the capacitor structure. Furthermore, a detection device for detecting the capacitance value of the capacitor structure can be connected with the display panel, so that the second part 132 of the packaging layer in the display panel can be monitored at any time, and related personnel can conveniently detect and find cracks in time.
In one embodiment of the present application, the display panel further includes a groove structure 150 disposed at one side of the peripheral region 120; in a direction perpendicular to the substrate 100, the first electrode 141, the second portion 132, and the second electrode 142 are at least partially disposed in the groove structure 150.
In the embodiment of the present application, the groove structures 150 are disposed on one side of the peripheral region 120 of the substrate 100, as shown in fig. 3, which is an enlarged schematic view of the position C of the display panel shown in fig. 2, the display panel is provided with three groove structures 150, and in practical application, a person skilled in the art may specifically set the specific number of the groove structures 150 according to actual requirements. In the direction perpendicular to the substrate 100, the first electrode 141, the second portion 132 and the second electrode 142 are at least partially located in the groove structure 150, i.e. the first electrode 141, the second portion 132 and the second electrode 142 have a shape structure corresponding to the groove structure 150. With this arrangement, the paths of the first electrode 141, the second portion 132, and the second electrode 142 can be extended, and at the same time, when a crack occurs in the second portion 132 of the encapsulation layer, the crack of the second portion 132 is delayed or even prevented from extending toward the first portion 131 located in the display region to some extent due to the extension of the path of the second portion 132.
It should be noted that, for the sake of clarity, the specific surrounding form of the groove structure 150 is shown, and therefore, the portion of the groove structure below the first electrode 141 in fig. 1 is not shown by a dotted line, but is shown by implementation.
In an embodiment of the present application, the display panel further includes a blocking structure 160, and the blocking structure 160 is disposed on one side of the peripheral region 120 and between the display region 110 and the groove structure 150.
In the embodiment of the present application, the barrier structure 160 is disposed on one side of the peripheral region 120 of the substrate 100, and as shown in fig. 2, the barrier structure 160 is located between the display region 110 and the groove structure 150 and is close to the outer edge of the display region 110 in the direction parallel to the substrate 100. The barrier structure 160 serves to block the material forming the organic encapsulation layer in the first portion 131 of the encapsulation layer from overflowing outwardly. The barrier structure 160 is covered by the packaging layer, and the second portion 132 of the packaging layer extends to the edge of the substrate 100 from the inner side to the outer side of the substrate 100 along the barrier structure 160, and the packaging path of the second portion 132 is extended, so that the packaging effect of the display panel is ensured, external water vapor, oxygen and the like are prevented from entering the display panel, and the service life of the display panel is influenced. In the embodiment of the present application, the position of the display area 110 is defined as inside, and the other areas are defined as outside.
It is understood by those skilled in the art that, in the embodiment of the present application, the encapsulation layer of the display panel is divided into the first portion 110 and the second portion 120 only for convenience of describing the structure of the display panel, and in the actual production process, the encapsulation layer is an integral film structure. Specifically, in the actual production process, the first inorganic encapsulation layer 133, the organic encapsulation layer 134, and the second inorganic encapsulation layer 135 are sequentially prepared to form an encapsulation layer, and the organic encapsulation layer 134 is ensured to be sandwiched between the first inorganic encapsulation layer 133 and the second inorganic encapsulation layer 135, so as to ensure that the organic encapsulation layer 134 does not contact with external gases such as water, oxygen, and the like. I.e. the first part of the encapsulation layer 110 comprises a first inorganic encapsulation layer 133, an organic encapsulation layer 134 and a second inorganic encapsulation layer 135 and the second part of the encapsulation layer 120 comprises a first inorganic encapsulation layer 133 and a second inorganic encapsulation layer 135.
In one embodiment of the present application, the cross-section of the groove structure 150 in the direction perpendicular to the substrate 100 includes a square, triangle, trapezoid, or circular arc shape. In the embodiment of the present application, the cross-sectional shape of the groove structure 150 includes a square shape, a triangular shape, a trapezoidal shape, or a circular arc shape. Those skilled in the art can choose to arrange the groove structure 150 with different cross-sectional shapes, for example, a square shape as shown in fig. 2, according to actual requirements, so that even though the manufacturing is facilitated, the surface path of the groove structure 150 is also extended, and then the paths of the first electrode 141, the second portion 132 and the second electrode 142 are extended.
If the surface path of the groove structure 150 needs to be further extended, a structure with a trapezoidal cross-sectional shape can be adopted; meanwhile, the trapezoidal cross-sectional shape is adopted, so that the connection area of the first electrode 141 and the display panel can be increased, the connection stability of the first electrode 141 and the display panel is enhanced, the connection stability of the second part 132 and the first electrode 141 and the connection stability of the second electrode 142 and the second part 132 are enhanced, and the stability of the display panel is improved.
In one embodiment of the present application, the first electrode 141 surrounds the periphery of the display region 110, and the first and second ends of the first electrode 141 are provided with a gap; the first end is connected to a first lead 1411, and the second end is connected to another first lead 1411.
In the embodiment of the present application, as shown in fig. 1, the first electrode 141 surrounds the periphery of the display area 110, but the first electrode 141 is not closed, the first end of the first electrode 141 is connected to a first lead 1411, the second end of the first electrode is connected to another first lead 1411, and the first lead 1411 is electrically connected to the capacitance detection device, so that relevant personnel can determine whether a crack occurs in the second portion 132 of the encapsulation layer of the display panel according to the change of the capacitance value of the capacitance structure, thereby facilitating timely handling, avoiding crack expansion, and affecting the stability and the lifetime of the display panel.
The display panel shown in fig. 2 further includes a buffer layer 171, a first insulating layer 172, a second insulating layer 173, an intermediate layer 174, a TFT (Thin Film Transistor) structure, a planarization layer 175, an anode layer 176, a pixel defining layer 177, a light emitting layer 178, and a cathode layer 179 provided on one side of the substrate 100. The TFT structure includes an active layer 181, a first gate electrode 182, a second gate electrode 183, and source and drain electrodes 184. In the embodiment, the light emitting layer 178 is an organic light emitting layer.
As shown in fig. 2, in a direction perpendicular to the substrate 100, the depth of the groove structure 150 is the sum of the thicknesses of the three film structures of the first insulating layer 172, the second insulating layer 173 and the intermediate layer 174, i.e., a buffer layer 171 is further disposed between the groove bottom of the groove structure 150 and the substrate 100.
In the embodiment of the present application, the display panel is a mirror display panel, that is, the display panel has both mirror and display functions, so that the metal mirror layer of the mirror display panel in the peripheral area 120 can be used as the second electrode 142 of the capacitor structure, and the metal mirror layer has an opening in the light emitting area of the display area.
Based on the same inventive concept, an embodiment of the present application provides a method for manufacturing a display panel, where a flow diagram of the method is shown in fig. 4, and the method includes:
s401, a first electrode is prepared in the substrate around a peripheral area outside the display area.
Alternatively, the display region 110 and the peripheral region 120 of the substrate 100 are determined according to a predetermined pattern, and then the buffer layer 171, the first insulating layer 172, the second insulating layer 173, the intermediate layer 174, and the TFT structure including the active layer 181, the first gate electrode 182, the second gate electrode 183, and the source and drain electrodes 184 are prepared on one side of the provided substrate 100, resulting in the first intermediate structure as shown in fig. 5 a.
The first insulating layer 172, the second insulating layer 173 and the intermediate layer 174 are processed by a patterning process in the peripheral region of the substrate 100, and etched to obtain the groove structure 150, so as to obtain the second intermediate structure shown in fig. 5 b.
Preparing a first electrode intermediate structure on one side of the second intermediate structure shown in fig. 5b, and patterning the first electrode intermediate structure to obtain a first electrode 141 located in the peripheral region 120, wherein the first electrode 141 covers the surface of the groove structure 150, and the cross-sectional shape of the first electrode 141 matches the cross-sectional shape of the groove structure 150, in this embodiment, the first electrode 141 includes a second groove structure matching the groove structure 150, so as to obtain a third intermediate structure of the display panel shown in fig. 5 c.
S402, preparing an encapsulation layer on one side of the substrate, such that a first portion of the encapsulation layer covers the display area, and a second portion of the encapsulation layer covers the peripheral area and the first electrode.
Alternatively, the encapsulation layer is prepared on one side of the substrate 100 through a vapor deposition process and a liquid curing process such that the first portion 131 of the encapsulation layer covers the display region 110 and the second portion 132 of the encapsulation layer covers the peripheral region 120 and the first electrode 141. The first part 131 of the encapsulation layer comprises an organic encapsulation layer sandwiched between inorganic encapsulation layers, and the second part 132 comprises several inorganic encapsulation layers arranged in a stack.
And S403, preparing a second electrode on the side, far away from the first electrode, of the second part to obtain the capacitor structure.
Optionally, a second electrode intermediate structure is prepared on one side of the encapsulation layer, and the second electrode intermediate structure is patterned to obtain a second electrode 142, the second electrode 142 is located on one side of the second portion 132 of the encapsulation layer, which is far away from the first electrode 141, and the second electrode 142, the first electrode 141, and the second portion 132 sandwiched therebetween are combined to form a capacitor structure.
In an embodiment of the present application, the preparing the first electrode 141 on one side of the groove structure 150 specifically includes:
a first metal layer, i.e., a first electrode intermediate structure, is prepared on one side of the substrate 100, and the first metal layer is patterned to obtain a source drain 184 or an anode layer 176 in the display region 110 and a first electrode 141 in the peripheral region 120. That is, in the embodiment of the present application, the first electrode 141 of the capacitor structure may be simultaneously prepared with the source/drain 184 or the anode layer 176, so as to improve the preparation efficiency of the display panel.
In one embodiment of the present application, before preparing the encapsulation layer on one side of the substrate 100, the method further includes:
the first organic layer is prepared on one side of the substrate 100, and patterned to obtain the planarization layer 175 or the pixel defining layer 177 in the display area 110, and the barrier structure 150 in the peripheral area 120, thereby obtaining a third intermediate structure of the display panel as shown in fig. 5 c. In the embodiment of the present application, the barrier structure 150 may be fabricated simultaneously with the planarization layer 175 or the pixel defining layer 177, so as to improve the fabrication efficiency of the display panel.
In an embodiment of the application, the step S402 specifically includes:
a first inorganic encapsulation layer 133 for preparing an encapsulation layer on one side of the substrate 100; in the embodiment of the present application, the first inorganic encapsulation layer 133 is prepared at one side of the third intermediate structure of the display panel as shown in fig. 5 c.
Preparing an organic encapsulation layer intermediate structure on one side of the first inorganic encapsulation layer 133, and processing the organic encapsulation layer intermediate structure through a photolithography process to obtain an organic encapsulation layer 134 on one side of the display region 110;
the second inorganic encapsulation layer 135 is prepared on one side of the organic encapsulation layer 134 and the first inorganic encapsulation layer 133 such that both the first inorganic encapsulation layer 133 and the second inorganic encapsulation layer 135 are at least partially located in the groove structure 150. That is, the first inorganic encapsulation layer 133 and the second inorganic encapsulation layer 135 each have a profile structure corresponding to the groove structure 150. Therefore, the path of the first inorganic encapsulation layer 133 and the second inorganic encapsulation layer 135 can be extended, and the crack of the first inorganic encapsulation layer 133 or the second inorganic encapsulation layer 135 is delayed or even prevented from extending toward the display region to some extent.
Alternatively, the first inorganic encapsulation layer 133 and the second inorganic encapsulation layer 135 may be formed by a vapor deposition process such as CVD, ALD, etc., and the organic encapsulation layer 134 may be formed by a liquid curing process such as inkjet printing, screen printing, etc.
In an embodiment of the application, the step S403 specifically includes:
a reflective metal layer is formed on one side of the package layer, and the reflective metal layer is patterned to obtain a metal mirror layer located in the display area 110 and a second electrode 142 located in the peripheral area 120, wherein at least a portion of the second electrode 142 is located in the groove structure 150.
In the embodiment of the present application, the display panel is a mirror display panel, a portion of the metal mirror layer of the mirror display panel in the peripheral area 120 can be used as the second electrode 142 of the capacitor structure, and the metal mirror layer has an opening in the light emitting area of the display area 110. The metal mirror layer of the mirror display panel is used as the second electrode 142 of the capacitor structure, so that the process of independently preparing the second electrode 142 is avoided, and the preparation efficiency of the display panel is improved. In the embodiment of the present application, the metal mirror layer may be made of metal, metal oxide, or alloy thereof, such as Al (aluminum), Mo (molybdenum), and Ag (silver), which have high reflectivity.
Based on the same inventive concept, embodiments of the present application provide a display device including the display panel provided in the above embodiments. The display device further comprises a capacitance detection device, and the capacitance structure of the display panel is electrically connected with the capacitance detection device so as to detect whether cracks appear on the packaging layer of the display panel according to the capacitance value of the capacitance structure.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
in the display panel provided in the embodiment of the present application, the peripheral area 120 of the substrate 100 is provided with the first electrode 141 and the second electrode 142, and the portion of the second portion 132 of the edge of the encapsulation layer in the display panel is sandwiched between the first electrode 141 and the second electrode 142. The first electrode 141, the second electrode 142 and the second portion 132 form a capacitor structure, and when a crack occurs in an encapsulation layer sandwiched between the first electrode 141 and the second electrode 142, a capacitance value of the capacitor structure changes, so that whether the crack occurs in the encapsulation layer of the display panel can be detected according to the capacitance value of the capacitor structure; compared with the existing crack detection technology, the display panel of the embodiment of the application does not need to damage the structure of the display panel in the detection process; meanwhile, the detection is convenient, so that technicians can find cracks of the display panel in time and adopt corresponding measures, the probability of crack expansion can be reduced, the stability of the display panel can be enhanced, and the service life of the display panel can be prolonged.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (12)
1. A display panel, comprising:
a substrate including a display area and a peripheral area surrounding outside the display area;
an encapsulation layer comprising a first portion and a second portion; the first portion includes an organic encapsulation layer sandwiched between inorganic encapsulation layers; the first portion covers the display area; the second portion comprises a plurality of inorganic encapsulation layers;
a capacitive structure disposed on one side of the peripheral region, the capacitive structure including a first electrode, a second electrode, and at least a portion of the second portion between the first electrode and the second electrode.
2. The display panel according to claim 1, further comprising a groove structure provided at one side of the peripheral region;
the first electrode, the second portion, and the second electrode are each at least partially located in the groove structure in a direction perpendicular to the substrate.
3. The display panel according to claim 2, further comprising a barrier structure disposed on one side of the peripheral region and between the display region and the groove structure.
4. The display panel according to claim 2, wherein a cross-section of the groove structure in a direction perpendicular to the substrate comprises a square, triangle, trapezoid, or circular arc shape.
5. The display panel according to claim 1, wherein the first electrode surrounds a periphery of the display region, and a first end and a second end of the first electrode are provided with a gap;
the first end is connected with a first lead wire, and the second end is connected with another first lead wire.
6. A method for manufacturing a display panel is characterized by comprising the following steps:
preparing a first electrode in the substrate around a peripheral area outside the display area;
preparing an encapsulation layer on one side of the substrate such that a first portion of the encapsulation layer covers the display area and a second portion of the encapsulation layer covers the peripheral area and the first electrode;
and preparing a second electrode on one side of the second part far away from the first electrode to obtain the capacitor structure.
7. The method of claim 6, wherein the preparing the first electrode on the substrate around the peripheral region outside the display region comprises:
preparing a groove structure in the peripheral area of the substrate;
and preparing the first electrode on one side of the groove structure, wherein the first electrode covers the surface of the groove structure and comprises a second groove structure matched with the groove structure.
8. The method of claim 7, wherein the preparing the first electrode on one side of the groove structure comprises:
preparing a first metal layer on one side of the substrate, and patterning the first metal layer to obtain a source drain electrode or an anode layer positioned in a display area and the first electrode positioned in the peripheral area.
9. The method for manufacturing a display panel according to claim 6, wherein the preparing of the encapsulation layer on one side of the substrate further comprises:
preparing a first organic layer on one side of the substrate, and patterning the first organic layer to obtain a flat layer or a pixel definition layer in a display area and a barrier structure in the peripheral area.
10. The method of claim 7, wherein the preparing an encapsulation layer on one side of the substrate such that a first portion of the encapsulation layer covers the display area and a second portion of the encapsulation layer covers the peripheral area and the first electrode comprises:
preparing a first inorganic encapsulation layer of an encapsulation layer on one side of the substrate;
preparing an organic encapsulation layer on one side of the first inorganic encapsulation layer, which is positioned in the display area;
preparing a second inorganic encapsulation layer on one side of the organic encapsulation layer and the first inorganic encapsulation layer, and enabling the first inorganic encapsulation layer and the second inorganic encapsulation layer to be at least partially positioned in the groove structure.
11. The method according to claim 7, wherein the step of forming a second electrode on a side of the second portion away from the first electrode to obtain a capacitor structure comprises:
preparing a reflective metal layer on one side of the packaging layer, and patterning the reflective metal layer to obtain a metal mirror layer located in a display area and the second electrode located in the peripheral area, wherein at least part of the second electrode is located in the groove structure.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 5.
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| CN109119445A (en) * | 2018-08-27 | 2019-01-01 | 京东方科技集团股份有限公司 | A kind of display base plate and preparation method thereof, display panel and display device |
| US20190097162A1 (en) * | 2017-09-27 | 2019-03-28 | Boe Technology Group Co., Ltd. | Display panel and manufacturing method thereof |
| CN110164344A (en) * | 2019-06-06 | 2019-08-23 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN110556407A (en) * | 2019-08-30 | 2019-12-10 | 武汉天马微电子有限公司 | Display panel and display device |
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| US20190097162A1 (en) * | 2017-09-27 | 2019-03-28 | Boe Technology Group Co., Ltd. | Display panel and manufacturing method thereof |
| CN109119445A (en) * | 2018-08-27 | 2019-01-01 | 京东方科技集团股份有限公司 | A kind of display base plate and preparation method thereof, display panel and display device |
| CN110164344A (en) * | 2019-06-06 | 2019-08-23 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN110556407A (en) * | 2019-08-30 | 2019-12-10 | 武汉天马微电子有限公司 | Display panel and display device |
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